© National Instruments
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Securing the Cover on the SCB-68A
In most cases, attaching the cover with the integrated magnets is sufficient. To permanently
secure the cover to the SCB-68A base, you will need two M3
×
6 (4-40
×
5/16) thread-forming
Phillips panhead screws, such as Taptite
Trilobular
screws. You can purchase Taptite screws
from many vendors. Complete the following steps.
1.
Using a 3.5 mm (9/64 in.) diameter drill bit, drill two holes through the silkscreened
crosshairs on the label side of the cover. When drilling, place the cover on a flat surface,
such as a drill press, and drill slowly to minimize burrs.
2.
Replace the cover on the base, lining up the drill holes with the holes in the enclosure.
3.
Screw the M3
×
6 (4-40
×
5/16) screws in with a torque of 8–10 in.
⋅
lb.
Soldering and Desoldering Components on the
SCB-68A
Some applications require you to make modifications to the SCB-68A, usually in the form of
adding components to the printed circuit device.
Soldering Equipment
To solder components on the SCB-68A, you need the following:
#1 and #2 Phillips screwdrivers
0.125 in. flathead screwdriver
Soldering iron and solder
Long nose pliers
Components specific to your application
Removing the SCB-68A Board from the Base
Complete the following steps to remove the SCB-68A from the base.
1.
Disconnect the 68-pin cable from the SCB-68A, if connected, and remove the top cover.
2.
Loosen the strain-relief screws, shown in Figure 1-1, with a #2 Phillips screwdriver.
3.
Remove any signal wires from screw terminals with a flathead screwdriver.
4.
Remove the printed circuit board mount screws and chassis ground lug, shown in
Figure 1-2, with a #1 Phillips screwdriver.
5.
Remove the 68-pin connector screws, shown in Figure 1-7, with a flathead screwdriver.
